Cylindeb and piston



May 26, 1931. G. M. BARNES CYLINDER AND PISTON Filed Dec. lO, 1930 5 E mn T NT *MW-n gm@ mm M n n d EN a l E 1 TORNEY Patented May 26, 19131 UNirD STATES PEN GLADEON IVI. BARNES, 0F THE UNTTED STATES ARMY, HASTINGS, MICHIGAN CYLINDER AND EISTON Application filed December 10, 193D. Serial No. 501,323.

(GRANTED UNBER THE ACT 0F MARCH 3, 1833, AS AMEN'DED APRIL 30, 1928; 370 O. G. '?57) rlhe invention described herein i may be controlling the introduction of the pressure manufactured and used by or for the Governmedium through the port 16 to the cylinder ment for governmental purposes, without the in front of the piston head and the latter payment to me of any royalty thereon. controlling the introduction of the pressure 5 This invention relates to cylinders and pismedium through the conduit Y17 to the cylin- 55 tons and more particularly it has reference lder in rear of the piston head. j to a system of supplying lubricant to the A cylinder 18 secured to the cylinder 5 by packed joints thereof. Y means of a hanger 19 constitutes a reservoir y The purpose of the invention is to employ for holding a. lubricant. In the forward 10a vgaseous medium compressed by apisten elongatedhead 2() of the cylinder 18 there ce for forcing a lubricant to the joints of the are placed two transversely disposed spaced cylinder and piston structure with 'a view to casings 21 and 22 threadedly secured to the lubricating the moving parts and establishcylinder 5. e ing fluid seals where necessary to prevent The casing 21 (see Fig. 2) is formed of two l5 leakage of the. pressure medium, y threadedly connected parts 21a and 2lb pro- .i

With the foregoing and other objects in viding' a central chamber 23. A passage 24 in View, the invention resides in the novel arpart 21a and a passage 25 in the part 2lb leadrangement and combination of parts and in ing tc a port 26 in the head 20 establish com- `the details of construction hereinafter demunicaticn between the cylinders 5 and 18 scribed and claimed, it being understood and enable the pressure medium to be adle that changes in the precise embodiment of mitted to the lubricant cylinder 18. A ball the invention herein disclosed may be made valve 27 in the chamber y23 is normally urged wit-hin the scope of what is claimed without by its spring 28 to close the passage 241. A departing from the spirit of the invention. vent passage 29 leading from the passage 25 25' A practical embodiment of the invention is to atmosphere may be closed by a needle valve illustrated in the accompanying drawings, 30. Y. wherein: A. sleeve 31 fitting in a reduced portion of Fig. 1 is a longitudinal sectional view of a the casing 21 abuts against a resilientpacking Y M cylinder and piston constructed in accordring 82 at each end. The packing rings are 3c ance with the invention; placed under compression when threadedly ce Figs. 2 and 3 are enlarged detail sectional connecting the parts 21a and 210 and previews through the valve mechanisms. vent leakage of the pressure medium passing Referring to the drawings by characters through the casing. An annular groove 33 of reference: 1n the part 21?; and a groove 34Y in the head 20 There is shown a cylinder 5 which in the encircling the sleeve v31 are in communication ci; application of lthe invention to a recoil `and with the passage 25 and the port 26.. Both of counter-recoil mechanism for guns, is atthe grooves are normally filled with lubritached to the movable gun barrel. 1Within cant from the cylinder 18 and provide a fluid v the cylinder is a piston having a hollow pisseal.

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head 7 and at the other to a stationary block casing 21 but is not equipped with valves. 8 which in the case of a gun is the cradle. A passage 35 in this casing connects with a rlhe piston head is provided with spaced sets peripheral groove 36 and a passage 37 in the of packing members 99 and the cylinder cylinder head 10 and also with a passage 38 in iead 10 through which the piston rod passes the head 2() leading to a tube 39 disposed in C; is likewise provided with spaced sets of packthe cylinder 18. rlhe passage 37 is positioned ingmenibers 11-11. between the packing members 11 and enables A' valve block 12 secured Vto the cradle is lubricant from the cylinder 18 to be supplied j provided with an inlet 13 for a pressure metothe piston rod and forni alluid seal. Lubridium and carries valves 14 and 15, the former cant will likewise fill the peripheral groove Een vton rod 6 secured at one end to the piston The casing 22 (see Fig. 1) is similar to the ed y 3G and form a luid seal on the outside of the cylinder head 10.

A conduit 40 leads from the rear end of the cylinder 18 to the valve block l2 and supplies lubricant to the valves lll and lby way of the passage 40a.

A second cylinder il for holding a lubricant is associated with the stationary elements, being supported by the block 8. This cylinder is in communication with the forward end of the hollow piston rod 6 by means of a port 49. in the rod, and a passage 4:3, chamber l-l and port Ll5 in the block 8. A second port 6in the piston rod adjacent the piston head enables the pressure medium from the cylinder' 5 to pass into the cylinder l1.

A thimble i7 disposed in the chamber dil and having communication therewith through a port Ai8 carries a needle valve 49 whose stem is spaced irom the wall of the thimble and provided kwith a vent 50. A ball valve 51 for closing the passage L13 is limited in movement by the thimble.

A passage 52 in the block 8 establishes communication between a tube in thecylinder 4l and a tube 54 within. the hollow piston rod, there being provided a port 55 in the piston rod. In order to facilitate connection ot' vthese passages they preferably terminate in peripheral grooves, the grooves 55, 57 and 58 vbeing shown in the various parts and when iilled with lubricant providing fluid seals where necessary.

The tube 54 is secured at one end in the piston head and supported at the other end in a retainer 59 so that it is held in spaced relation with respect to the hollow piston rod. rllhe tube serves to supply lubricant to a pas- (SO leading to a peripheral groove 6l formed in the piston head between the sets of packing 9*.9.

ln operation the relative movement of the cylinder and piston acts to compress a medium which is delivered to the cylinders 18 and f-l to place the lubricant in these cylinders under pressure and force it to various parts of the structure where it is utilized to lubricate and establish fluid seals for preventing leakage of the pressure medium. vvVhere the pressure medium is one that will deposit carbon the lubricant will be available to prevent the carbon from adhering to the cylinder walls.

rI'he pressure to be developed in the cylinders l5 and all may be controlled by respective adjustment or' the valves 30 and A9.

l claim:

l. ln combination with a cylinder and piston, a valved gas inlet for the cylinder, a liquid reservoir ca ried by the cylinder, a liquid reservoir carried by the piston, a `valved communication between the cylinder and its reservoir, a valved communication between the cylindeiand the reservoir 'of the piston, a valved vent for each of the communications, a liquid passage leading from the reservoir of the cylinder to the piston rod and a liquid passage leading from the reservoir of the piston to the piston head.

2. ln combination with a pair of relatively reciprocal members, a gas inlet for one. of said members, a liquid reservoir associated with each of said members, means for admitting gas pressure tothe reservoirs, and means for conducting liquid from the reservoirs to bearing surfaces of the reciprocal members.

8. A cylinder, a valved inlet for admitting a gaseous mediumto the cylinder, a piston Vcompressing the gaseous medium., a liquid reservoir associated with the cylinder, a pair of casings disposed in one end ofthe reservoir and attached to the cylinder, a valved communication in one of thecasings for conducting the gaseous medium to the reservoir, a val-ved communication in the vother casing for conducting liquid from the reservoir to the stutling boX of the cylinder, and means for conducting liquid from the reservoir to the vvalve/d inlet.

il. A cylinder, a valved inlet for admitting a gaseous medium to the cylinder, a piston compressing the gaseous medium, a liquid reservoir lassociated with the cylinder, a pair of casings disposed in one end ofthe reservoir and attached to .the cylinder, a valved communication vin one oin the casings for conducting the gaseous medium to the reservoir, and a valved communication in the .other casing for conducting liquid from the reservoir ,to the cylinder.

5. A cylinder, means for `admitting a gaseous medium to the cylinder, a piston compressing the gaseous medium, a liquid reservoir associated with the cylinder, means for admitting .the pressure medium to the reservoir, and means for conducting lliquid from the reservoir to bearing surfaces of the cylin der.

6. A cylinder, means for admitting argaseous medium to the cylinder, a piston having a hollow rod for compressing the gaseousmedium, a liquid reservoir carried by the piston rod and having communication with the cylinder through the piston rod whereby the pressure medium is .conducted to the vreser- Voir, a tube within the piston rod and having communication with the exterior ofthe piston head and a. liquid passage between the tube and the reservoir.

7. ln combination with a cylinder and piston, means for admitting a gaseous medium to the cylinder, a lubricant reservoir associated with the cylinder and piston and having communication with movable and lunsealed elements or" the cylinder and piston, and means for admitting the gaseous mediuml to the reservoir to distribute the lubricant.

GLADEON M, BARNES. 

